RING-O is a ringmodulator effect plugin.
Modulation source can be the left and right side of a stereo signal modulating each other, or a stereo signal modulated by RING-O's internal oscillator.
The internal oscillator has different wave forms, the pitch can be adjusted manually or by incoming MIDI notes.
RING-O also features a diode ring modulator style setting for a more dirty sound, the ability to adjust the modulation mix and internal 8x oversampling.
RING-O is available as a Windows VST plugin for free here